[yocto] BBB doesn't boot

[Denys Dmytriyenko]

On Wed, Apr 16, 2014 at 12:36:58AM +0100, Richard Purdie wrote:
> On Tue, 2014-04-15 at 15:43 -0400, Denys Dmytriyenko wrote:
> > I don't yet know what is going on, but building in the same directory with 
> > sources (B = S) makes it work regarless of the path length:
> > 
> > /OE/RAM/poky-111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111/22222222222222222222222222222222222222222222222222222222222222222222/3333333333333333333333333333333333333333333333333333/tmp/work/beaglebone-poky-linux-gnueabi/linux-yocto/3.14+gitAUTOINC+928d7b2dda_0143c6ebb4-r0/linux
> > 
> > So, I just commented out setting kernel-specific B in linux-yocto.inc and any 
> > kernel now boots with long path:
> > 
> > #B = "${WORKDIR}/linux-${PACKAGE_ARCH}-${LINUX_KERNEL_TYPE}-build"
> > 
> > I'm copying Richard and Bruce directly to see if they may have a quick insight 
> > and/or accept it as a workaround for the release. I'll keep digging further, 
> > but if anyone cares to verify the above workaround works for them, I would 
> > appreciate. Thanks!
> 
> I'm travelling and don't have hardware so I'm limited in what I can look
> at right now. I suspect this workaround "works" because it makes the
> "beaglebone-standard-build" extra characters on the path. I have a
> feeling your -1111111 test above may have reused sstate or something
> like that and given misleading results. I'd be interested in the vmlinux
> file from the build above to see if the poky-111111 pathnames are in
> there (they get stripped out when you create the zImage).

Nope, I was fooled by sstate once, so this time I tested with cleansstate and 
compared timestamps of the kernel when it boots - it is definitely the new 
one. And to make sure 'beaglebone-standard-build' extra suffix doesn't affect 
it, I increased the path length even further - that extra level with 333 is 
there to over-compensate, as it was failing before even with just 111 and 222 
levels only... Looks like Gary was also able to verify it.

But, you are right about vmlinux - it doesn't have those paths in there any 
more! I've seen them there when building with B != S, but they are gone when 
building with B = S. Wondering why. You can check it for yourself:

http://arago-project.org/files/short-term/misc/vmlinux-3.14.0-yocto-standard

-- 
Denys